A filter screen

Abstract

This utility model relates to the field of filter technology and discloses a filter screen, including a filter basket and a filter bag. The filter basket has a barrel-shaped structure with filter holes all over its body. The bottom of the barrel is turned inward and upward to form an outer barrel with an upward opening and an inner barrel with a downward opening. The filter bag is used to fit inside the filter basket. The diameter of the filter bag is approximately the same as the diameter of the filter basket, and its length is approximately the sum of the lengths of the outer and inner barrels of the filter basket. The filter bag is also turned inward and upward, fitting inside the outer barrel and outside the inner barrel. This utility model flips the bottom of the filter basket upward to the inside, thereby allowing the filter bag to be turned inward and fitted onto the outer and inner barrels of the filter screen, increasing the filtration area by more than 50%.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a filter screen. Background Technology

[0002] Gas filters are used in gas channels to filter gas flow, removing particulate matter and ensuring the output gas meets predetermined standards. Existing gas filters typically use a filter screen as the filter element, with a filter bag fitted over a filter basket. The filter screen has large pores, while the filter bag uses different mesh sizes of filter cloth depending on the parameters of the filtered material, thus achieving the function of filtering particles of different sizes in the gas.

[0003] In existing filter baskets, filter bags are fitted over the filter. Gas enters through the opening in the basket and exits from the side of the filter bag. The usable area of ​​the filter bag is the inner surface area of ​​the filter basket. To increase this filtration area, the length or diameter of the filter basket must be increased. Increasing the diameter will lead to a decrease in gas pressure, while increasing the length will require increasing the height of the filter, thus increasing manufacturing costs. Utility Model Content

[0004] The purpose of this utility model is to solve the above problems and provide a filter screen in which the bottom of the filter basket is flipped upwards to the inside, so that the filter bag can be flipped inwards and put on the outer and inner barrels of the filter screen, increasing the filtration area by more than 50%.

[0005] The technical solution adopted by this utility model is:

[0006] A filter screen, characterized in that it includes a filter basket and a filter bag, wherein the filter basket has a barrel-shaped structure, the barrel body is covered with filter holes, the bottom of the barrel is turned inward and upward to form an outer barrel with an opening facing upward and an inner barrel with an opening facing downward, the filter bag is used to fit inside the filter basket, the diameter of the filter bag is equivalent to the barrel diameter of the filter basket, and the length is equivalent to the sum of the lengths of the outer barrel and the inner barrel of the filter basket, the filter bag is also turned inward and upward, fitting inside the outer barrel and outside the inner barrel.

[0007] Furthermore, the inner barrel of the filter basket is a frustum shape, smaller at the top and larger at the bottom.

[0008] Furthermore, the length of the inner tub is greater than half the length of the outer tub.

[0009] Furthermore, the filter bag has a circular opening at the top, with an arc-shaped handle on the opening.

[0010] Furthermore, a flange is provided on the outer side of the ring opening. The diameter of the flange is larger than the inner diameter of the outer barrel opening of the filter basket. When the filter bag is placed inside the filter basket, the flange is engaged with the outer barrel opening.

[0011] Furthermore, the filter basket is made of stainless steel and is formed by rolling and welding stainless steel plates, with evenly distributed filter holes formed on the stainless steel plates.

[0012] The beneficial effects of this utility model are:

[0013] (1) Increase the filtration area by more than 50% without increasing the size of the filter basket;

[0014] (2) Using the original filter equipment, no additional modification costs are incurred;

[0015] (3) Simple to operate and easy to use. Attached Figure Description

[0016] Appendix Figure 1 This is a schematic diagram of the structure of the filter basket of this utility model;

[0017] Appendix Figure 2 This is a schematic diagram of the structure of the filter bag of this utility model;

[0018] Appendix Figure 3 It is attached Figure 2 Top view;

[0019] Appendix Figure 4 It is attached Figure 2 A magnified view of part A above;

[0020] Appendix Figure 5 This is a schematic diagram showing the assembly of the filter bag and filter basket after installation.

[0021] The labels in the attached diagram are as follows:

[0022] 1. Filter basket; 2. Filter bag;

[0023] 3. Filter holes; 4. Outer barrel;

[0024] 5. Inner tub; 6. Rim;

[0025] 7. Ring opening; 8. Handle;

[0026] 9. Flange. Detailed Implementation

[0027] The following detailed description of a specific embodiment of the filter screen according to the present invention, with reference to the accompanying drawings, is provided in detail.

[0028] See appendix Figure 1This patent discloses a filter screen comprising a filter basket 1 and a filter bag 2. The filter basket 1 has a barrel-shaped structure with filter holes 3 distributed throughout its body. The bottom of the barrel is turned inward and upward to form an outer barrel 4 with an upward opening and an inner barrel 5 with a downward opening. The inner barrel 5 is a frustum-shaped structure, wider at the bottom than at the top, and its length is greater than half the length of the outer barrel 4. The top of the inner barrel 5 closes the lower opening. The connection between the outer barrel 4 and the inner barrel 5 is achieved by spot welding an annular plate. Filter holes 3 are also provided on the top of the inner barrel 5 and on the annular plate. A flange 6 is provided at the upper opening of the filter basket 1 for fixing it to the filter and sealing it. The filter basket 1 is made of stainless steel, formed by rolling and welding stainless steel plates, with evenly distributed filter holes 3 formed on the stainless steel plates.

[0029] See appendix Figure 2-4 Filter bag 2 is used to fit inside filter basket 1. The diameter of filter bag 2 is approximately the same as the diameter of filter basket 1, and its length is approximately the sum of the lengths of the outer barrel 4 and inner barrel 5 of filter basket 1. Filter bag 2 is also turned inward and upward, fitting inside the outer barrel 4 and outside the inner barrel 5. The opening end of filter bag 2 is a circular ring 7, with an arc-shaped handle 8 on the ring 7. A flange 9 is provided on the outside of the ring 7. The diameter of flange 9 is larger than the inner diameter of the opening of the outer barrel 4 of filter basket 1. When filter bag 2 is placed inside filter basket 1, flange 9 is engaged with the opening of outer barrel 4. Filter bag 2 is made of filter cloth material with different mesh counts according to different working parameter requirements.

[0030] See appendix Figure 5 During operation, the filter bag 2 is inserted into the filter basket 1 through the handle 8 by holding the handle 8. The bottom of the filter bag 2 rests on the top of the inner barrel 5. By pressing down on the inside of the filter bag 2, the filter bag 2 completely covers the inner barrel 5, and the outer wall of the filter bag 2 fits against the inner wall of the outer barrel 4. At this time, the ring opening 7 of the filter bag 2 matches the edge 6 of the filter basket 1. This forms two filtration areas: the inner wall of the outer barrel 4 and the outer wall of the inner barrel 5, allowing gas to pass through for filtration.

[0031] The above are merely preferred embodiments of this utility model. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A filter screen, characterized in that: The system includes a filter basket and a filter bag. The filter basket has a barrel-shaped structure with filter holes all over its body. The bottom of the barrel is turned inward and upward to form an outer barrel with an upward opening and an inner barrel with a downward opening. The filter bag is used to fit inside the filter basket. The diameter of the filter bag is equivalent to the diameter of the filter basket, and the length is equivalent to the sum of the lengths of the outer barrel and the inner barrel. The filter bag is also turned inward and upward and fits inside the outer barrel and outside the inner barrel.

2. A filter screen according to claim 1, characterized in that: The inner barrel of the filter basket is a frustum-shaped container that is smaller at the top and larger at the bottom.

3. A filter screen according to claim 1, characterized in that: The length of the inner tub is greater than half the length of the outer tub.

4. A filter screen according to any one of claims 1 to 3, characterized in that: The filter bag has a circular opening at one end, and an arc-shaped handle is provided on the opening.

5. A filter screen according to claim 4, characterized in that: A flange is provided on the outer side of the ring opening. The diameter of the flange is larger than the inner diameter of the outer barrel opening of the filter basket. When the filter bag is placed inside the filter basket, the flange is engaged with the outer barrel opening.

6. A filter screen according to any one of claims 1 to 3, characterized in that: The filter basket is made of stainless steel and is formed by rolling and welding stainless steel plates. The stainless steel plates have evenly distributed filter holes.

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